PMID- 26733532
OWN - NLM
STAT- MEDLINE
DCOM- 20180306
LR  - 20180417
IS  - 1460-2199 (Electronic)
IS  - 1047-3211 (Linking)
VI  - 27
IP  - 2
DP  - 2017 Feb 1
TI  - Neural Processing of Second-Order Motion in the Suprasylvian Cortex of the Cat.
PG  - 1347-1357
LID - 10.1093/cercor/bhv320 [doi]
AB  - Neuronal responses to second-order motion, that is, to spatiotemporal variations 
      of texture or contrast, have been reported in several cortical areas of mammals, 
      including the middle-temporal (MT) area in primates. In this study, we 
      investigated whether second-order responses are present in the cat posteromedial 
      lateral suprasylvian (PMLS) cortex, a possible homolog of the primate area MT. 
      The stimuli used were luminance-based sine-wave gratings (first-order) and 
      contrast-modulated carrier stimuli (second-order), which consisted of a 
      high-spatial-frequency static grating (carrier) whose contrast was modulated by a 
      low-spatial-frequency drifting grating (envelope). Results indicate that most 
      PMLS neurons responded to second-order motion and for the vast majority of cells, 
      first- and second-order preferred directions were conserved. However, responses 
      to second-order stimuli were significantly reduced when compared to those evoked 
      by first-order gratings. Circular variance was increased for second-order 
      stimuli, indicating that PMLS direction selectivity was weaker for this type of 
      stimulus. Finally, carrier orientation selectivity was either absent or very 
      broad and had no influence on the envelope's orientation selectivity. In 
      conclusion, our data show that PMLS neurons exhibit similar first- and 
      second-order response profiles and that, akin primate area MT cells, they perform 
      a form-cue invariant analysis of motion signals.
CI  - (c) The Author 2016. Published by Oxford University Press. All rights reserved. For 
      Permissions, please e-mail: journals.permissions@oup.com.
FAU - Bussieres, L
AU  - Bussieres L
AD  - Ecole d'optometrie, Universite de Montreal.
AD  - Departement de Physiologie, Faculte de Medecine, Universite de Montreal, 
      Montreal, QC, Canada H3C 3J7.
FAU - Casanova, C
AU  - Casanova C
AD  - Ecole d'optometrie, Universite de Montreal.
LA  - eng
GR  - MOP-14825/CIHR/Canada
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Cereb Cortex
JT  - Cerebral cortex (New York, N.Y. : 1991)
JID - 9110718
SB  - IM
MH  - Animals
MH  - Cats
MH  - Cerebral Cortex/physiology
MH  - *Motion
MH  - Motion Perception/*physiology
MH  - Neurons/physiology
MH  - Orientation/*physiology
MH  - Photic Stimulation/methods
MH  - Visual Cortex/*physiology
MH  - Visual Fields/physiology
MH  - Visual Perception/*physiology
OTO - NOTNLM
OT  - contrast-modulated carrier
OT  - direction selectivity
OT  - form-cue invariant motion
OT  - single-cell recordings
OT  - visual cortex
EDAT- 2016/01/07 06:00
MHDA- 2018/03/07 06:00
CRDT- 2016/01/07 06:00
PHST- 2016/01/07 06:00 [pubmed]
PHST- 2018/03/07 06:00 [medline]
PHST- 2016/01/07 06:00 [entrez]
AID - bhv320 [pii]
AID - 10.1093/cercor/bhv320 [doi]
PST - ppublish
SO  - Cereb Cortex. 2017 Feb 1;27(2):1347-1357. doi: 10.1093/cercor/bhv320.